BOSTON – Wei-Yin Chen pitched perfect ball into the sixth inning, Adam Jones helped provide an early cushion and the Baltimore Orioles beat the Boston Red Sox 10-6 Wednesday for a three-game sweep.

The Orioles took an 8-0 lead in the fifth and maintained their double-digit lead atop the AL East.

Caleb Joseph homered and drove in three runs and Ryan Flaherty got a career-high four hits as Baltimore won for the 11th time in 14 games.

Chen (15-4) retired the first 16 batters before Dan Butler doubled off the Green Monster for his first major league hit. Chen gave up one run and three hits in seven innings, striking out four without a walk.

The Red Sox scored five runs in the ninth. Darren O’Day got the last out with two runners on for his third save.

Brandon Workman (1-9) lost his ninth straight decision since winning at Baltimore on June 10.

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Jones’ two-run double highlighted a six-run third, and Joseph hit a two-run drive in the fifth. Jones and Joseph each had three hits.

Chen improved to 12-2 in his last 21 starts. The only run off the left-hander scored on a home run by Xander Bogaerts.

Carlos Rivero hit his first career homer, a three-run shot off Joe Saunders, in the ninth.

The Orioles combined six hits, two walks and Rivero’s throwing error from third base for their burst in the third. Alejandro De Aza, Joseph and Flaherty each had RBI singles and Steve Pearce drew a bases-loaded walk.

TRAINER’S ROOM

Orioles: SS J.J. Hardy missed his fifth straight game with lower back spasms. The hope is he’ll be ready to play in Friday’s doubleheader against the Yankees. “He’s feeling good,” manager Buck Showalter said. “We’ll have a better idea (Thursday).”

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Red Sox: 2B Dustin Pedroia was out for the second straight game with soreness in his left wrist and left hand, and is probably done for the season. Boston manager John Farrell said Pedroia was “moving toward probably a procedure, but nothing definitive right now.” … INF-OF Brock Holt missed his fifth straight because of illness, but is expected to play in the upcoming series in Kansas City.

UP NEXT

Orioles: Off Thursday before opening a 10-game homestand with a doubleheader against the Yankees on Friday. RHP Kevin Gausman (7-7, 3.83 ERA) and RHP Bud Norris (12-8, 3.92) are slated to go for Baltimore.

Red Sox: RHP Clay Buchholz (7-8, 5.29) is scheduled to start Thursday night in Kansas City against RHP Liam Hendriks (1-1, 4.81).